Aiming　at　the　characteristics　and　problems　on　rib　hoisting　of　long　span　CFST　arch　bridge,　the　optimization　theory　was　introduced　to　predict　the　cable　tension　and　pre　camber　value,　and　the　rigid　displacement　caused　by　rotational　displacement　continuum　was　also　considered.　While　assembling　the　first　segment,　all　segments　of　the　FEM　model　without　weight　but　the　closure　segment　were　generated　at　the　same　time,　and　then　loaded　it　according　to　the　order　of　construction.　The　object　of　construction　control　was　to　set　the　elevation　deviation　of　reference　points　on　rib　in　an　appropriate　range.　The　first　order　analytical　method　was　adopted　to　solve　the　precamber　value　by　iterative　optimization　method.　This　method　was　used　in　the　construction　control　of　a　deck　arch　bridge　and　turned　out　to　be　practical　and　simple.　It　can　present　the　prediction　value　of　buckled　cable　tension　and　precamber　quite　accurately.